-/***************************************************************************
- * Copyright (C) 2011 by Peter Penz <peter.penz19@gmail.com> *
- * *
- * Based on the Itemviews NG project from Trolltech Labs: *
- * http://qt.gitorious.org/qt-labs/itemviews-ng *
- * *
- * This program is free software; you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation; either version 2 of the License, or *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program; if not, write to the *
- * Free Software Foundation, Inc., *
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
- ***************************************************************************/
+/*
+ * SPDX-FileCopyrightText: 2011 Peter Penz <peter.penz19@gmail.com>
+ *
+ * Based on the Itemviews NG project from Trolltech Labs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
#include "kitemlistcontainer.h"
#include "kitemlistcontroller.h"
#include "kitemlistview.h"
-#include "kitemmodelbase.h"
-
#include "private/kitemlistsmoothscroller.h"
#include <QApplication>
+#include <QFontMetrics>
#include <QGraphicsScene>
#include <QGraphicsView>
-#include <QPropertyAnimation>
#include <QScrollBar>
-#include <QStyle>
+#include <QScroller>
#include <QStyleOption>
-#include <KDebug>
-
/**
* Replaces the default viewport of KItemListContainer by a
* non-scrollable viewport. The scrolling is done in an optimized
*/
class KItemListContainerViewport : public QGraphicsView
{
+ Q_OBJECT
+
public:
KItemListContainerViewport(QGraphicsScene* scene, QWidget* parent);
protected:
- virtual void wheelEvent(QWheelEvent* event);
+ void wheelEvent(QWheelEvent* event) override;
};
KItemListContainerViewport::KItemListContainerViewport(QGraphicsScene* scene, QWidget* parent) :
KItemListContainer::KItemListContainer(KItemListController* controller, QWidget* parent) :
QAbstractScrollArea(parent),
m_controller(controller),
- m_horizontalSmoothScroller(0),
- m_verticalSmoothScroller(0)
+ m_horizontalSmoothScroller(nullptr),
+ m_verticalSmoothScroller(nullptr),
+ m_scroller(nullptr)
{
Q_ASSERT(controller);
controller->setParent(this);
m_verticalSmoothScroller = new KItemListSmoothScroller(verticalScrollBar(), this);
if (controller->model()) {
- slotModelChanged(controller->model(), 0);
+ slotModelChanged(controller->model(), nullptr);
}
if (controller->view()) {
- slotViewChanged(controller->view(), 0);
+ slotViewChanged(controller->view(), nullptr);
}
- connect(controller, SIGNAL(modelChanged(KItemModelBase*,KItemModelBase*)),
- this, SLOT(slotModelChanged(KItemModelBase*,KItemModelBase*)));
- connect(controller, SIGNAL(viewChanged(KItemListView*,KItemListView*)),
- this, SLOT(slotViewChanged(KItemListView*,KItemListView*)));
+ connect(controller, &KItemListController::modelChanged,
+ this, &KItemListContainer::slotModelChanged);
+ connect(controller, &KItemListController::viewChanged,
+ this, &KItemListContainer::slotViewChanged);
+
+ m_scroller = QScroller::scroller(viewport());
+ m_scroller->grabGesture(viewport());
+ connect(controller, &KItemListController::scrollerStop,
+ this, &KItemListContainer::stopScroller);
+ connect(m_scroller, &QScroller::stateChanged,
+ controller, &KItemListController::slotStateChanged);
}
KItemListContainer::~KItemListContainer()
// Don't rely on the QObject-order to delete the controller, otherwise
// the QGraphicsScene might get deleted before the view.
delete m_controller;
- m_controller = 0;
+ m_controller = nullptr;
}
KItemListController* KItemListContainer::controller() const
return;
}
- const bool scrollHorizontally = (event->orientation() == Qt::Horizontal) ||
- (event->orientation() == Qt::Vertical && !verticalScrollBar()->isVisible());
+ const bool scrollHorizontally = (qAbs(event->angleDelta().y()) < qAbs(event->angleDelta().x())) ||
+ (!verticalScrollBar()->isVisible());
KItemListSmoothScroller* smoothScroller = scrollHorizontally ?
m_horizontalSmoothScroller : m_verticalSmoothScroller;
- const int numDegrees = event->delta() / 8;
- const int numSteps = numDegrees / 15;
-
- const QScrollBar* scrollBar = smoothScroller->scrollBar();
- smoothScroller->scrollTo(scrollBar->value() - numSteps * scrollBar->pageStep() / 4);
-
- event->accept();
+ smoothScroller->handleWheelEvent(event);
}
void KItemListContainer::slotScrollOrientationChanged(Qt::Orientation current, Qt::Orientation previous)
{
- Q_UNUSED(previous);
+ Q_UNUSED(previous)
updateSmoothScrollers(current);
}
void KItemListContainer::slotModelChanged(KItemModelBase* current, KItemModelBase* previous)
{
- Q_UNUSED(current);
- Q_UNUSED(previous);
+ Q_UNUSED(current)
+ Q_UNUSED(previous)
}
void KItemListContainer::slotViewChanged(KItemListView* current, KItemListView* previous)
QGraphicsScene* scene = static_cast<QGraphicsView*>(viewport())->scene();
if (previous) {
scene->removeItem(previous);
- disconnect(previous, SIGNAL(scrollOrientationChanged(Qt::Orientation,Qt::Orientation)), this, SLOT(slotScrollOrientationChanged(Qt::Orientation,Qt::Orientation)));
- disconnect(previous, SIGNAL(scrollOffsetChanged(qreal,qreal)), this, SLOT(updateScrollOffsetScrollBar()));
- disconnect(previous, SIGNAL(maximumScrollOffsetChanged(qreal,qreal)), this, SLOT(updateScrollOffsetScrollBar()));
- disconnect(previous, SIGNAL(itemOffsetChanged(qreal,qreal)), this, SLOT(updateItemOffsetScrollBar()));
- disconnect(previous, SIGNAL(maximumItemOffsetChanged(qreal,qreal)), this, SLOT(updateItemOffsetScrollBar()));
- disconnect(previous, SIGNAL(scrollTo(qreal)), this, SLOT(scrollTo(qreal)));
- m_horizontalSmoothScroller->setTargetObject(0);
- m_verticalSmoothScroller->setTargetObject(0);
+ disconnect(previous, &KItemListView::scrollOrientationChanged,
+ this, &KItemListContainer::slotScrollOrientationChanged);
+ disconnect(previous, &KItemListView::scrollOffsetChanged,
+ this, &KItemListContainer::updateScrollOffsetScrollBar);
+ disconnect(previous, &KItemListView::maximumScrollOffsetChanged,
+ this, &KItemListContainer::updateScrollOffsetScrollBar);
+ disconnect(previous, &KItemListView::itemOffsetChanged,
+ this, &KItemListContainer::updateItemOffsetScrollBar);
+ disconnect(previous, &KItemListView::maximumItemOffsetChanged,
+ this, &KItemListContainer::updateItemOffsetScrollBar);
+ disconnect(previous, &KItemListView::scrollTo, this, &KItemListContainer::scrollTo);
+ disconnect(m_horizontalSmoothScroller, &KItemListSmoothScroller::scrollingStopped, previous, &KItemListView::scrollingStopped);
+ disconnect(m_verticalSmoothScroller, &KItemListSmoothScroller::scrollingStopped, previous, &KItemListView::scrollingStopped);
+ m_horizontalSmoothScroller->setTargetObject(nullptr);
+ m_verticalSmoothScroller->setTargetObject(nullptr);
}
if (current) {
scene->addItem(current);
- connect(current, SIGNAL(scrollOrientationChanged(Qt::Orientation,Qt::Orientation)), this, SLOT(slotScrollOrientationChanged(Qt::Orientation,Qt::Orientation)));
- connect(current, SIGNAL(scrollOffsetChanged(qreal,qreal)), this, SLOT(updateScrollOffsetScrollBar()));
- connect(current, SIGNAL(maximumScrollOffsetChanged(qreal,qreal)), this, SLOT(updateScrollOffsetScrollBar()));
- connect(current, SIGNAL(itemOffsetChanged(qreal,qreal)), this, SLOT(updateItemOffsetScrollBar()));
- connect(current, SIGNAL(maximumItemOffsetChanged(qreal,qreal)), this, SLOT(updateItemOffsetScrollBar()));
- connect(current, SIGNAL(scrollTo(qreal)), this, SLOT(scrollTo(qreal)));
+ connect(current, &KItemListView::scrollOrientationChanged,
+ this, &KItemListContainer::slotScrollOrientationChanged);
+ connect(current, &KItemListView::scrollOffsetChanged,
+ this, &KItemListContainer::updateScrollOffsetScrollBar);
+ connect(current, &KItemListView::maximumScrollOffsetChanged,
+ this, &KItemListContainer::updateScrollOffsetScrollBar);
+ connect(current, &KItemListView::itemOffsetChanged,
+ this, &KItemListContainer::updateItemOffsetScrollBar);
+ connect(current, &KItemListView::maximumItemOffsetChanged,
+ this, &KItemListContainer::updateItemOffsetScrollBar);
+ connect(current, &KItemListView::scrollTo, this, &KItemListContainer::scrollTo);
+ connect(m_horizontalSmoothScroller, &KItemListSmoothScroller::scrollingStopped, current, &KItemListView::scrollingStopped);
+ connect(m_verticalSmoothScroller, &KItemListSmoothScroller::scrollingStopped, current, &KItemListView::scrollingStopped);
+
m_horizontalSmoothScroller->setTargetObject(current);
m_verticalSmoothScroller->setTargetObject(current);
updateSmoothScrollers(current->scrollOrientation());
return;
}
- KItemListSmoothScroller* smoothScroller = 0;
- QScrollBar* scrollOffsetScrollBar = 0;
+ KItemListSmoothScroller* smoothScroller = nullptr;
+ QScrollBar* scrollOffsetScrollBar = nullptr;
int singleStep = 0;
int pageStep = 0;
int maximum = 0;
if (view->scrollOrientation() == Qt::Vertical) {
smoothScroller = m_verticalSmoothScroller;
scrollOffsetScrollBar = verticalScrollBar();
- singleStep = view->itemSize().height();
+
+ // Don't scroll super fast when using a wheel mouse:
+ // We want to consider one "line" to be the text label which has a
+ // roughly fixed height rather than using the height of the icon which
+ // may be very tall
+ const QFontMetrics metrics(font());
+ singleStep = metrics.height() * QApplication::wheelScrollLines();
+
// We cannot use view->size().height() because this height might
// include the header widget, which is not part of the scrolled area.
pageStep = view->verticalPageStep();
return;
}
- KItemListSmoothScroller* smoothScroller = 0;
- QScrollBar* itemOffsetScrollBar = 0;
+ KItemListSmoothScroller* smoothScroller = nullptr;
+ QScrollBar* itemOffsetScrollBar = nullptr;
int singleStep = 0;
int pageStep = 0;
if (view->scrollOrientation() == Qt::Vertical) {
}
}
+void KItemListContainer::stopScroller()
+{
+ m_scroller->stop();
+}
+
void KItemListContainer::updateGeometries()
{
QRect rect = geometry();
projects / dolphin.git / blobdiff